Question: What are the languages spoken by Dietrich Buxtehude, which have the cases of or are in the vocative case (VC)?
Paraphrase: What are the languages spoken via Dietrich Buxtehude, which have the instances of or are in the vocative case (VC)?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q153637 wdt:P1412 ?answer . ?answer wdt:P2989 wd:Q185077}
Answer: Latin